medium Set 2 Unknown

This page uses a content type that does not have a custom renderer yet. Raw structured data is shown below.

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    "title": "form-exercise set 2",
    "operation": "balance-scale",
    "subject": "arithmetic",
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            "question": "[?] = 14",
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                5,
                "?"
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            "question": "[5 + ?] = 10",
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                4,
                4,
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            "question": "[4 + 4 + ?] = 22",
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                "?"
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            "rhs": 21,
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            "type": "balance-scale",
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                1,
                "?"
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            "rhs": 6,
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            "question": "[1 + ?] = 6",
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            "id": 16,
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                "?"
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            "rhs": 23,
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            "rhs": 6,
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                "?"
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            "rhs": 19,
            "answer": 15,
            "question": "[4 + ?] = 19",
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